What are the medications for constipation?

There are many medications for constipation, such as stimulant medications, osmotic medications, volumetric medications and lubricating medications.
1. stimulant drugs: its main role is to stimulate intestinal peristalsis to achieve the effect of laxative, commonly used bisacodyl, castor oil, senna and so on.
2. osmotic drugs: it is mainly to increase the intestinal water, is conducive to the discharge of stool. Commonly used are lactulose, magnesium sulfate, mannitol and so on.
3. Volumetric drugs: it is mainly to increase the intestinal fiber content to promote defecation. Commonly used are psyllium, wheat bran, calcium polycarbophil and so on.
4. Lubricating drugs: it is mainly through the lubrication of stool, to improve the constipation, such as glycerin, liquid paraffin and so on.
What kind of constipation medication should be applied by the patient, should go to the hospital under the guidance of the doctor, and should not be applied by themselves.